The Prime Minister is technically the leader of the party so more like the US Speaker of The House than the President. Technically the King as the head of Stat

The Prime Minister is technically the leader of the party so more like the US Speaker of The House than the President. Technically the King as the head of State has the role of President, but of course the King is effectively a figurehead. Imagine if the House of Representatives managed to slap down the President and the Senate so hard that they never got up again, and you have what is effectively the UK system of government.